Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 d248d3a2943c83e4…

MALICIOUS

Office (OOXML) / .XLSX

2.11 MB Created: 2025-05-22 22:02:38 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2025-05-23
MD5: 796a521e7c003799a377a6a3551d8985 SHA-1: 3404e4b2131d66687c7deb5f48f4c540f6f14b1a SHA-256: d248d3a2943c83e462ed318d23dbf351e0c1a1433860e791fb07743eccebf984
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

The file is an OOXML document containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. This type of object is known to be vulnerable to exploits that can lead to arbitrary code execution. The heuristic 'OLE_EQUATION_EDITOR' strongly suggests this file is designed to leverage this vulnerability, likely to download and execute a second-stage payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/pSrlonDr.ZN32Si contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
dd3f44c546956612d363041f5d38996aaa2f976fae33186c2e0e5f8b5ae8d8c6		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/pSrlonDr.ZN32Si 2994176 bytes

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